Mechanical pencil



FIG. 1 is a top, left front perspective view of a mechanical pencilshowing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a front elevational view;

FIG. 4 is a right side elevational view;

FIG. 5 is a left side elevational view;

FIG. 6 is a rear elevational view; and

FIG. 7 is a bottom plan view thereof.

The ornamental design for a mechanical pencil, as shown and described.